Places beginning with RO in Ohio, United States
- Roachester
- Roachton
- Road Fork
- Roads
- Roaming Shores
- Roaming Shores, Village of
- Roanoake
- Robbins (historical)
- Roberts
- Robertsburg
- Roberts (historical)
- Roberts (historical)
- Robertsville
- Robin Park (subdivision)
- Robins
- Robtown
- Robyville
- Rochester
- Rochester
- Rochester, Township of
- Rock
- Rockaway
- Rockbridge
- Rock Camp
- Rock Camp
- Rock Canyon Park
- Rock Creek
- Rock Cut
- Rockdale
- Rockford
- Rockford
- Rock Haven Park
- Rock Hill
- Rockhouse (historical)
- Rockland
- Rockledge Farms
- Rock Mill
- Rock Mills
- Rockport
- Rockport
- Rockport (historical)
- Rock Springs
- Rockville
- Rockville
- Rock Way
- Rockwell (historical)
- Rockwood
- Rockwood Park
- Rocky Fork
- Rocky Hill
- Rocky Ridge
- Rocky River
- Rocky River, City of
- Rodney
- Roe Corners
- Rogers
- Rohs Hill
- Rokeby Lock
- Rolandus
- Rollersville
- Rolling Hill Acres (subdivision)
- Rolling Hills
- Rolling Knolls Estate
- Rolling Meadow Acres (subdivision)
- Rolling Terrace Mobile Home Park
- Rome
- Rome
- Rome
- Rome
- Rome
- Rome, City of
- Rome, Township of
- Rome, Township of
- Rome, Township of
- Romohr Acres
- Rootstown
- Rootstown, Township of
- Roscoe
- Rose Addition
- Rosedale
- Rosedale
- Rose Farm
- Rose Garden Mobile Home Park
- Rose Hill
- Rose Hill Heights (subdivision)
- Roseland
- Roseland
- Roselawn
- Rose Lawn
- Roselms
- Rosemont
- Rosemoor
- Rosemount
- Rose Park (subdivision)
- Rose, Township of
- Roseville
- Rosewood
- Ross
- Rossburg
- Rossburg
- Ross County
- Rosseau
- Rossford
- Rossford, City of
- Rossmoyne
- Ross, Township of
- Ross, Township of
- Ross, Township of
- Rossville
- Roswell
- Round Bottom
- Roundhead
- Roundhead, Township of
- Rousculp
- Rowdyville (historical)
- Rowenton
- Rowland (historical)
- Rowlesville
- Rowsburg
- Roxabell
- Roxanna
- Roxbury
- Royal
- Royal Springs Estates
- Royalton
- Royalton, Township of
- Royersville